1. an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host

Definition categories: animal, being, organism

2. a follower who hangs around a host (without benefit to the host) in hope of gain or advantage

Similar word(s): leech, sponge, sponger

Definition categories: person, follower

Sentences with parasite as a noun:

- Lice, fleas, ticks and mites are widely spread parasites.